CN103003656B - Gas generator and method for preventing gas leakage - Google Patents
Gas generator and method for preventing gas leakage Download PDFInfo
- Publication number
- CN103003656B CN103003656B CN201180035004.8A CN201180035004A CN103003656B CN 103003656 B CN103003656 B CN 103003656B CN 201180035004 A CN201180035004 A CN 201180035004A CN 103003656 B CN103003656 B CN 103003656B
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- Prior art keywords
- annular
- side face
- cup
- collar
- shaped housing
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/10—Initiators therefor
- F42B3/103—Mounting initiator heads in initiators; Sealing-plugs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J7/00—Apparatus for generating gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/34—Belt retractors, e.g. reels
- B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Abstract
The present invention provides a gas generator including: an igniter, a collar for holding the igniter, and a cup-shaped case fixed to the collar and charged inside with gas generating agent, the collar formed by a combination of a metallic portion and a resin portion which is integrated with the metallic portion, the collar being provided with an annular groove formed in an outer peripheral surface thereof, the cup-shaped case and the collar being fixed by fitting a bent portion, which is obtained by bending inward an end portion in an opening side of the cup-shaped case, to the annular groove, an annular space being formed by an inner wall surface of the bent portion and the collar, and being in communication with an inside of the cup-shaped case.
Description
Invention field
The present invention relates to a kind of gas generator being suitable for the seat belt pretensioner of vehicle etc.
The explanation of association area
Seat belt pretensioner has the mechanism of the gas-powered produced by gas generator to regain tension seat harness.The small gas generator holding igniter and gas-forming agent is in the housing known as the gas generator used in seat belt pretensioner.In order to make the effect of pretensioner display, must by from gas generator gas when without any leakage be supplied to pretensioner.
JP-A No.2002-239371 and JP-A No.2001-106017 discloses the example of the gas generator used in seat belt pretensioner.
JP-A No.2002-239371 discloses and that formed reinforcement 7 integrated with keeper 6, as the structure of the cup 3 for fixing accommodation gas-forming agent 2.Reinforcement 7 is one-body molded with the peripheral part of the keeper 6 be formed from a resin by being insert molded.
JP-A No.2001-106017 discloses and comprises the structure that extruding is fitted together to the ring body 4 of the periphery to the keeper 3 be formed from a resin.Ring body 4 is kept for the cylindrical vessel 1 loading gas-forming agent P, and except being fixed by extruding is chimeric, screw rod or bolt can also be used to be fixed.
Summary of the invention
The invention provides a kind of gas generator, comprising:
Igniter,
For keeping the collar (collar) of described igniter, and
Be fixed to the described collar and be filled with the cup-shaped housing of gas-forming agent in inside,
The described collar formed by metal section and the combination of resin portion that integrates with described metal section, and the described collar is provided with the annular groove being formed at its outer peripheral face,
Described cup-shaped housing and the described collar are by fixing chimeric for joggling part to described annular groove, and described joggling part is bent inwards by the end of the open side by described cup-shaped housing and obtains,
Formed and the annular space be connected with the inside of described cup-shaped housing with the described collar by the internal face of described joggling part.
Accompanying drawing explanation
From the detailed description hereafter provided and accompanying drawing by comprehend the present invention, accompanying drawing only provides in a schematic way, does not therefore limit the present invention, in the drawings and in which:
Fig. 1 shows according to gas generator of the present invention.In FIG, (a) shows the axial cross-sectional view of display according to the assembly method of gas generator of the present invention, and (b) shows the axial cross-sectional view of display according to the structure of gas generator of the present invention;
Fig. 2 shows the partial enlarged view of the gas generator shown in Fig. 1;
Fig. 3 shows axially half viewgraph of cross-section of another embodiment according to gas generator of the present invention;
Fig. 4 shows axially half viewgraph of cross-section of the another embodiment according to gas generator of the present invention; And
Fig. 5 shows the another embodiment according to gas generator of the present invention.In Figure 5, (a) shows its axially half viewgraph of cross-section, and (b) shows the partial enlarged view (cup-shaped housing is not shown) of Fig. 5 (a).
Detailed Description Of The Invention
For the gas generator according to JP-A No.2002-239371 and JP-A No.2001-106017, if when increasing when the pressure that the pressure of cup or cylindrical vessel inside produces due to start, the power of outside expansion reinforcement 7 or ring body 4 works, and easily forms gap at reinforcement 7 or between ring body 4 and keeper.In addition, adopt the screw rod in JP-A No.2001-106017 or bolt to add extra processing, and add amount of parts, therefore also have very large room for improvement from the angle of simple structure or processing method.
The invention provides a kind of gas generator, it is easily assembled, and when start not gas leakage.
The invention provides following preferred embodiment 2 to 8:
2. gas generator of the present invention, wherein
Joggling part comprise be positioned at cup-shaped enclosure interior inside opening periphery, inner annular side face and annular warpage bight,
The annular groove of the collar comprises upper, annular side face, lower annular side face and connects the ring wall surface of upper, annular side face and lower annular side face, and
Cup-shaped housing and the collar are fixed in the following manner:
The inside opening periphery of joggling part abuts the upper, annular side face of annular groove, and
The lower annular side face of the annular warpage bight abutment ring shape groove of joggling part.
3. gas generator, wherein
Joggling part comprise be positioned at cup-shaped enclosure interior inside opening periphery, inner annular side face and annular warpage bight,
The annular groove of the collar comprises upper, annular side face, lower annular side face and connects the ring wall surface of upper, annular side face and lower annular side face, and
Cup-shaped housing and the collar are fixed in the following manner:
The inside opening periphery of joggling part abuts the upper, annular side face of annular groove, and
The interior ring-shaped periphery of joggling part abuts the ring wall surface of annular groove.
4. gas generator, wherein
Joggling part comprise be positioned at cup-shaped enclosure interior inside opening periphery, inner annular side face and annular warpage bight,
The annular groove of the collar comprises upper, annular side face, lower annular side face and connects the ring wall surface of upper, annular side face and lower annular side face, and
Cup-shaped housing and the collar are fixed in the following manner:
The inside opening periphery of joggling part abuts the upper, annular side face of annular groove,
The inner annular side face of joggling part abuts the ring wall surface of annular groove, and
The lower annular side face of the annular warpage bight abutment ring shape groove of joggling part.
5. the gas generator of embodiment 2, wherein
Joggling part comprise be positioned at cup-shaped enclosure interior inside opening periphery, inner annular side face and annular warpage bight,
The annular groove of the collar comprises upper, annular side face, lower annular side face and connects the ring wall surface of upper, annular side face and lower annular side face, and at least one in ring wall surface and lower annular side face is formed by the metal section of the collar.
6. gas generator, wherein
Cup-shaped housing has outstanding multiple raised in inner side to its surrounding wall portion, and
The plurality of projection abuts the collar.
7. gas generator, comprises further
Multiple projection, it is arranged at the surrounding wall portion of cup-shaped housing;
Cylindrical wall, it is arranged at resin portion and for surrounding the ignition part with fixing point firearm, described cylindrical wall comprises the annular protrusion being formed at its outer peripheral face,
Wherein, the internal diameter limited by projection is slightly less than the external diameter of annular protrusion.
8. the gas generator of embodiment 7, wherein, is fixed to the collar by cup-shaped housing, makes projections press contact annular protrusion.
The invention provides the purposes of gas generator for seat belt pretensioner or seat belt retractor.
Igniter is known ignition in the gas generator for seat belt pretensioner or airbag apparatus, and comprises at least ignition part and conductive pin.
The collar is also for the known elements in gas generator, comprises the metal section by injection moulding integration and resin portion.The collar is holding point firearm under the state of resin portion around igniter.
Cup-shaped housing is the housing that inside is filled with known gas-forming agent.In the present invention, the cup-shaped housing by metal resilient cup's housing such as such as stainless steel, iron etc. or plastically deformable can be used, because it is easy to be mounted to the collar.
The annular groove of the collar can only be formed in metal section or only in resin portion, or can be formed in both metal section and resin portion simultaneously.
In cup-shaped housing, bend inwards near the perisporium of opening, and by holder housing in the annular groove that joggling part is fitted together to the collar.
In order to increase the chimeric intensity be fitted together to by joggling part in the annular groove of the collar, preferably, regulate the internal diameter size of joggling part and the outside dimension (internal diameter size < outside dimension) of annular groove, to make when being fitted together to cup-shaped housing into annular groove, abutting part forms extruding contact.
When being fitted together to cup-shaped housing into the collar, formed the annular space be connected with the inside of cup-shaped housing by joggling part and the collar.
When start, because the gas produced by the burning of the gas-forming agent of cup-shaped enclosure interior (air pressure) uniformly pushing forms the wall (surface of joggling part and the surface of the collar) of annular space, so the bond strength between joggling part and the collar increases, and therefore play a part to prevent Leakage Gas.
The joggling part of cup-shaped housing can comprise be positioned at cup-shaped enclosure interior inside opening periphery, inner annular side face and annular warpage bight.
The annular groove of the collar can comprise upper, annular side face, lower annular side face and connect the ring wall surface on these surfaces.
By selecting from following three embodiments listed, the contact condition between the joggling part of cup-shaped housing and the annular groove of the collar can be arranged to any one in (i), the whole combination of (ii) and (iii), the combination of (i) and (ii) and the combination of (i) and (ii).As illustrated below the present invention, joggling part abuts annular groove, or joggling part is fixed to annular groove.
I the inside opening periphery of () joggling part abuts the upper, annular side face of annular groove.
(ii) the inner annular side face of joggling part abuts the ring wall surface of annular groove.
(iii) the lower annular side face of the annular warpage bight abutment ring shape groove of joggling part.
Cup-shaped housing can be shaped to be had from the inwardly outstanding multiple projections of its surrounding wall portion.By making projection abut the collar (preferably, by extruding contact), can realize strengthening improving the constant intensity of cup-shaped housing to the collar.
For gas generator according to the present invention, when increasing when the gas that the pressure of enclosure interior produces due to start, the adhesion at the fitting portion place between cup-shaped housing and the collar increases.Therefore, when start not in generation gap, fitting portion place, and the leakage of the gas that can prevent.
Embodiment of the present invention
(1) gas generator shown in Fig. 1 and 2
With reference to Fig. 1, the embodiment according to gas generator 10 of the present invention is described.Gas generator 10 shown in Fig. 1 is suitable for the gas generator used in seat belt retractor.
In gas generator 10 according to the present invention, igniter 12 is fixed to the collar 20, and cup-shaped housing 40 is fixed to the collar 20 further.
Igniter 12 is the igniters usually used in the gas generator for gas-bag system or seat belt retractor, and has ignition part 13 and pair of conductive pin 14.
The collar 20 is made up of metal section 21 and the combination of resin portion 22 that integrates with metal section 21.The resin described in JP-A No.2003-161599 can be used as the resin forming resin portion 22.
Metal section 21 is made up of stainless steel or iron, has shallow cup-shaped, and it comprises the hole on its bottom surface, to allow passing through of conductive pin 14, and has annular bottom surface 23 and peripheral wall surfaces 24.
Resin portion 22 has the first cylindrical wall 25 and the second cylindrical wall 38, first cylindrical wall 25 is surrounded and fixed ignition portion 13 forms the space for being fitting to connection device with pair of conductive pin 14, second cylindrical wall 38 of igniter.Annular protrusion 26 and annular groove 27 are formed on the outer peripheral face of the first cylindrical wall 25.
A part for the annular bottom surface 23 of metal section 21 is clamped between the first cylindrical wall 25 of resin portion 22 and the second cylindrical wall 38, and forms one with the first cylindrical wall 25 and the second cylindrical wall 38.
And the inner peripheral surface of the peripheral wall surfaces 24 of metal section 21 contacts with the second cylindrical wall 38 of resin portion 22 and integrated.
Annular groove 27 has upper, annular side face 28, lower annular side face 29 and connects the above-mentioned ring wall surface of surperficial 27 and 28 30.In embodiment in FIG, although lower annular side face 29 is corresponding to can't help the surface of annular bottom surface 23 of metal section 21 that resin portion 22 covers, lower annular side face 29 can be coated with resin portion 22.
Cup-shaped housing 40 is made up of the metal of such as stainless steel, iron etc., and has elasticity.
The inner space 40a of cup-shaped housing 40 is filled with the gas-forming agent (not shown) usually used in the gas generator for gas-bag system or seat belt retractor.Gas-forming agent contacts with the ignition part 13 of igniter 12.
Cup-shaped housing 40 has bottom surface 41, perisporium 42 and opening 43.The frangible portion 41a formed by recess or indentation is formed on bottom surface 41.According to the device of suitable gas generator 10, frangible portion can also be formed on perisporium 42.
The end of the perisporium 42 of opening 43 side bends inwards, to form joggling part 45.Joggling part 45 has the inside opening periphery 46 of the inside being positioned at cup-shaped housing 40, inner annular side face 47 and annular warpage bight 48.
As shown in figs. 1 and 2, cup-shaped housing 40 and the collar 20, as what describe in following (i) to (iii), relative to each other abut.In this case, " abutting " represents the state of close contact.
(abutting embodiment 1)
In order to cup-shaped housing 40 is fixed to the collar 20,
I the inside opening periphery 46 of () joggling part 45 abuts the upper, annular side face 28 of annular groove 27,
(ii) the inner annular side face 47 of joggling part 45 abuts the ring wall surface 30 of annular groove 27, and
(iii) the annular warpage bight 48 of joggling part 45 abuts the metal section 21 (annular bottom surface 23) of the lower annular side face 29 of annular groove 27.
Although cup-shaped housing 40 and the collar 20 are advantageously as relative to each other abutting of describing in above (i) to (iii), also alternatively adopt the following embodiment for abutting.
(abutting embodiment 2): cup-shaped housing 40 and the collar 20 pass through (i) embodiment against each other with (ii).
(abutting embodiment 3): cup-shaped housing 40 and the collar 20 pass through (i) embodiment against each other with (iii).
Be installed in the state of the collar 20 by cup-shaped housing 40 as shown in Fig. 1 (b), annular space 50 is formed by the joggling part 45 of perisporium 42 and the first cylindrical wall 25.Annular space 50 is connected with inner space 40a.
Because cup-shaped housing 40 is made by having flexible metal, by the outside dimension (d2) of the internal diameter size (d1) of adjustment joggling part 45 (inner annular side face 47) with the ring wall surface 30 of annular groove 27, to make internal diameter size (d1) be slightly less than outside dimension (d2), cup-shaped housing 40 can be extruded and be fitted together in the collar 20 (resin portion 22).It is favourable for completing extruding by this way chimeric, because can increase the constant intensity of cup-shaped housing 40 to the collar 20.
Cup-shaped housing 40 has projection 49, and it is inwardly given prominence to from the perisporium 42 of the position near opening 43.Projection 49 is circumferentially made up of with rule or suitable spaced apart independently projection multiple.But alternative employing continuous circular shape is given prominence to.Form projection 49 so that annular space 50 and inner space 40a are connected with each other logical.
Although projection 49 abuts relative to the annular protrusion 26 of the first cylindrical wall 25 in Fig. 1 (b), projection 49 also can not abut.Regulate the height of projection 49, to make gas-forming agent not from the clearance leakage between adjacent projection 49 to annular space 50.
It should be noted that, from the angle increasing constant intensity, as described above, and desirable, cup-shaped housing 40 is extruded and is fitted together to the collar 20 (resin portion 22), meanwhile, also make projection 49 extrude contact annular protrusion 26.
Next, the method for installing cup-shaped housing 40 will be described.
Regulate the internal diameter size (d1) of the joggling part 45 (inner ring-type side face 47) of cup-shaped housing to the outside dimension (d2) of ring wall surface 30 being slightly less than annular groove 27 in advance.
As shown in Fig. 1 (a), when cup-shaped housing 40 is fitted together to from the top relative to the element (ignitor assembly) being fixed with igniter 12 at the collar 20, joggling part 45 is abutted against with annular protrusion 26 phase of resin portion 22, and the temporarily ground distortion of extruding expansion laterally, then, joggling part 45 inwardly contraction distortion, and be securely fitted together to the annular groove 27 into collar resin portion 22.Now, because when meeting the relation of d1<d2, joggling part 45 (inner ring-type side face 47) relative to annular groove 27 (ring wall surface 30) extruding, and increases the constant intensity of cup-shaped housing 40 and the collar 20.
And the projection 49 of cup-shaped housing abuts the annular protrusion 26 of the first cylindrical wall 25.Now, because by the external diameter regulating the internal diameter (distance between projection respect to one another) limited by projection 49 to be slightly less than annular protrusion 26, make multiple projection 49 to be extruded contact annular protrusion 26, can assist the constant intensity increasing cup-shaped housing 40 and the collar 20, be therefore preferred.
Next, the movement when gas generator 10 start will be described.
When initial firing current point of arrival firearm 12, the gunpowder in combustion ignition portion 13, and produce combustion product (flame, high-temperature gas etc.).
This combustion product lights the gas-forming agent in the 40a of inner space, and produces burning gases.
When producing burning gases in cup-shaped housing 40, the pressure of cup-shaped housing 40 inside raises, and whole cup-shaped housing 40 expands.Now, although burning gases also enter annular space 50, as what represented by the arrow in Fig. 2, pressure puts on the internal face (that is, comprising the face of the internal face in inner ring-type side face 47 and annular warpage bight 48) forming annular space 50 equably.
Therefore, because the generation of uniform pressure can play the effect of the bond strength (dhering strength) between joggling part 45 and the annular groove 27 of the collar 20 increasing cup-shaped housing 40, not only can prevent gas from leaking to outside atmosphere from cup-shaped housing 40 and the contact site of the collar 20, meanwhile, also can prevent cup-shaped housing 40 from coming off from the collar 20.
Subsequently, when the pressure of housing 40 inside meets or exceeds setting level, housing 40 breaks at frangible portion 41a place, whereby, burning gases etc. is discharged housing 40, with reliable start seat belt retractor.
In the embodiment shown in Fig. 1 and 2, although the joggling part 45 of cup-shaped housing 40 is against each other by above-mentioned " abutting embodiment 1 " with the annular groove 27 of the collar 20, but adopt abut embodiment 2 or 3 time, by shown in the arrow in Fig. 2 due to evenly apply pressure to annular space 50 internal face and also can realize same action effect.
(2) gas generator shown in Fig. 3
Although the gas generator shown in Fig. 3 100 is at the gas generator 10 be different from shape shown in Fig. 1 and 2 of the joggling part of cup-shaped housing, other parts (comprise do not represented by reference number those) are identical with the gas generator 10 shown in Fig. 1 and 2.
Cup-shaped housing 140 has bottom surface 141, perisporium 142 and opening.The frangible portion 141a formed by recess or indentation is formed on bottom surface 141.According to the device of suitable gas generator 100, frangible portion also can be formed on perisporium 142.Inner space 140a is filled with gas-forming agent.And, the projection 49 be formed on cup-shaped housing 40 shown in Fig. 1 can also be set.
The end of the open side of perisporium 142 bends inwards and forms joggling part 145.Joggling part 145 have be positioned at cup-shaped housing 140 inside inside opening periphery 146, inner annular side face 147 and annular warpage bight 148.
In the gas generator 100 shown in Fig. 3, the inside opening periphery 146 of joggling part 145 abuts the upper, annular side face 28 of annular groove 27, and the annular warpage bight 148 of joggling part 145 abuts the metal section 21 (annular bottom surface 23) as the lower annular side face 29 of annular groove 27, thus is fixed to one another with the annular groove 27 of the collar 20 (what describe abuts embodiment 3) by the joggling part 145 of the perisporium 142 of cup-shaped housing 140 before.
In the gas generator 100 shown in Fig. 3, the inner space 150 be connected with inner space 140a is formed with the collar 20 (resin portion 22) by the joggling part 145 of the perisporium 142 of cup-shaped housing 140.
When gas generator 100 start shown in Fig. 3, air pressure is acted on equably the internal face of annular space 150.Therefore, the action effect same with the gas generator 10 shown in Fig. 1 and 2 can be realized.
(3) gas generator shown in Fig. 4
Although the gas generator shown in Fig. 4 200 is at the gas generator 10 be different from shape shown in Fig. 1 and 2 of the joggling part of cup-shaped housing, other parts (comprise do not represented by reference number those) are identical with the gas generator 10 shown in Fig. 1 and 2.
Cup-shaped housing 240 has bottom surface 241, perisporium 242 and opening.The frangible portion 241a formed by recess or indentation is formed on bottom surface 241.According to the device using gas generator 200, frangible portion also can be formed on perisporium 242.Inner space 240a is filled with gas-forming agent.And, the projection 49 be formed on cup-shaped housing 40 shown in Fig. 1 can also be set.
The end of the open side of perisporium 242 bends inwards and forms joggling part 245.Joggling part 245 have be positioned at cup-shaped housing 240 inside inside opening periphery 246, inner annular side face 247 and annular warpage bight 248.Compared to the joggling part of Fig. 1 and 2, joggling part 245 is formed as (rounded) with circle.
In the gas generator 200 shown in Fig. 4, the inside opening periphery 246 of joggling part 245 abuts the upper, annular side face 28 of annular groove 27, the inner annular side face 247 of joggling part 245 abuts the ring wall surface 30 of annular groove 27, and the annular bending angle 248 of joggling part 245 abuts the metal section 21 (annular bottom surface 23) as the lower annular side face 29 of annular groove 27, so that the joggling part 245 of cup-shaped housing 240 is fixed to one another with the annular groove 27 of the collar 20 (what describe abuts embodiment 1) before.
In the gas generator 200 shown in Fig. 4, the inner space 250 be communicated with inner space 240a is formed with the collar 20 (resin portion 22) by the joggling part 245 of the peripheral wall surfaces 242 of cup-shaped housing 240.
When gas generator 200 start shown in Fig. 4, air pressure is acted on equably the internal face of annular space 250.Therefore, the action effect same with the gas generator 10 shown in Fig. 1 and 2 can be realized.
(4) gas generator shown in Fig. 5
Although Fig. 5 (a) and the gas generator 300 shown in (b) are different from the gas generator 10 shown in Fig. 1 and 2 on thimble structure, other parts (comprise do not represented by reference number those) are identical with the gas generator 10 shown in Fig. 1 and 2.
Metal section 221 is made up of stainless steel or iron, and is on its bottom surface with the shallow cup-shaped of perforate.Although metal section 221 has annular bottom surface 223 and peripheral wall surfaces 224 in the mode identical with metal section 21 shown in Fig. 1, but metal section 221 is different from the metal section 21 shown in Fig. 1, because metal section 221 has from annular bottom surface 223 towards the cylindrical shape wall 225 outstanding with peripheral wall surfaces 224 opposition side.
In the embedded resin portion, 225a side, end 22 of cylindrical shape wall 225, and inner peripheral surface 225b contacts with resin portion 22.
Although the annular groove shown in Fig. 5 27 has the structure identical with the annular groove in Fig. 1 and 2 and identical shape, but the annular groove shown in Fig. 5 27 is different from the annular groove shown in Fig. 1, because ring wall surface 30 is formed by the cylindrical shape wall 225 of metal section, and lower annular side face 29 is formed by the annular bottom surface 223 of metal section, although upper, annular side face 28 is formed by resin portion 22.
In gas generator 300 shown in Fig. 5, the annular space 350 be connected with inner space 40a is formed with the collar 20 (resin portion 22) by the joggling part 45 of the peripheral wall surfaces 42 of cup-shaped housing 40.
When gas generator 300 start shown in Fig. 5, air pressure is acted on equably the internal face of annular space 350.Therefore, the action effect same with the gas generator 10 shown in Fig. 1 and 2 can be realized.
In addition, the gas generator shown in above-mentioned Fig. 1 to 5 can also be used as the igniter of the air bag gas generator shown in Fig. 3 of JP-A No.2004-217059.
Because described herein the present invention, be apparent that, identical mode can change in many-side.These changes are not thought and are departed from the spirit and scope of the present invention, and all these changes will be apparent to those skilled in the art, and it is intended to comprise within the scope of the appended claims.
Claims (12)
1. a gas generator, it comprises:
Igniter,
For keeping the collar of described igniter, and
Be fixed to the described collar and be filled with the cup-shaped housing of gas-forming agent in inside,
The described collar formed by metal section and the combination of resin portion that integrates with described metal section, and the described collar is provided with the annular groove being formed at its outer peripheral face,
Described cup-shaped housing and the described collar are by fixing chimeric for joggling part to described annular groove, and described joggling part is bent inwards by the end of the open side by described cup-shaped housing and obtains,
It is characterized in that described gas generator also comprises to be formed and the annular space be connected with the inside of described cup-shaped housing with the described collar by the internal face of described joggling part.
2. gas generator according to claim 1, wherein,
Described joggling part comprise be positioned at described cup-shaped enclosure interior inside opening periphery, inner annular side face and annular warpage bight,
The annular groove of the described collar comprises upper, annular side face, lower annular side face and connects the ring wall surface of described upper, annular side face and described lower annular side face, and
Described cup-shaped housing and the described collar are fixed in the following manner:
The inside opening periphery of described joggling part abuts the upper, annular side face of described annular groove, and
The annular warpage bight of described joggling part abuts the lower annular side face of described annular groove.
3. gas generator according to claim 1, wherein,
Described joggling part comprise be positioned at described cup-shaped enclosure interior inside opening periphery, inner annular side face and annular warpage bight,
The annular groove of the described collar comprises upper, annular side face, lower annular side face and connects the ring wall surface of described upper, annular side face and described lower annular side face, and
Described cup-shaped housing and the described collar are fixed in the following manner:
The inside opening periphery of described joggling part abuts the upper, annular side face of described annular groove, and
The inner annular side face of described joggling part abuts the ring wall surface of described annular groove.
4. gas generator according to claim 1, wherein,
Described joggling part comprise be positioned at described cup-shaped enclosure interior inside opening periphery, inner annular side face and annular warpage bight,
The annular groove of the described collar comprises upper, annular side face, lower annular side face and connects the ring wall surface of described upper, annular side face and described lower annular side face, and
Described cup-shaped housing and the described collar are fixed in the following manner:
The inside opening periphery of described joggling part abuts the upper, annular side face of described annular groove,
The inner annular side face of described joggling part abuts the ring wall surface of described annular groove, and
The annular warpage bight of described joggling part abuts the lower annular side face of described annular groove.
5. the gas generator according to any one of claim 2 to 4, wherein,
Described joggling part comprise be positioned at described cup-shaped enclosure interior inside opening periphery, inner annular side face and annular warpage bight,
The annular groove of the described collar comprises upper, annular side face, lower annular side face and connects the ring wall surface of described upper, annular side face and described lower annular side face, and at least one in described ring wall surface and described lower annular side face is formed by the metal section of the described collar.
6. gas generator according to claim 1, wherein,
Described cup-shaped housing has outstanding multiple raised in inner side to its surrounding wall portion, and
Described multiple projection abuts the described collar.
7. gas generator according to claim 1, it comprises further:
Multiple projection, it is arranged at the surrounding wall portion of described cup-shaped housing;
Cylindrical wall, it is arranged at resin portion and for surrounding the ignition part with fixing point firearm, described cylindrical wall comprises the annular protrusion be formed on its outer peripheral face,
Wherein, the internal diameter limited by described projection is slightly less than the external diameter of described annular protrusion.
8. gas generator according to claim 7, wherein, is fixed to the described collar by described cup-shaped housing, makes described projections press contact described annular protrusion.
9. gas generator according to claim 1, wherein frangible portion be formed at cup-shaped housing bottom surface on or on perisporium.
10. gas generator according to claim 1, wherein cup-shaped housing is made by having flexible metal, and the internal diameter size of joggling part is less than the outside dimension of annular groove, makes joggling part be formed each other to extrude with the abutting part of annular groove and contact.
11. methods preventing gas from leaking from cup-shaped housing with the contact site for the collar of holding point firearm, comprising:
The collar formed by metal section and the combination of resin portion that integrates with described metal section is set, and the described collar comprises the annular groove being formed at its outer peripheral face;
In described cup-shaped housing, gas-forming agent is set;
The described cup-shaped housing comprising joggling part is fixed to described annular groove, and described joggling part is bent inwards by the end of the open side by described cup-shaped housing and obtains;
Arrange and formed and the annular space be connected with the inside of described cup-shaped housing with the described collar by the internal face of described joggling part;
The described internal face of pressure uniform ground extruding of burning gases, and
Increase the dhering strength between joggling part and annular groove.
12. methods preventing gas from leaking from cup-shaped housing with the contact site for the collar of holding point firearm according to claim 11, comprising:
In described cup-shaped housing, multiple projection is set;
In the cylindrical wall of the collar, annular protrusion is set; And
Described cup-shaped housing is fixed to the described collar, makes described multiple projections press contact described annular protrusion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-170360 | 2010-07-29 | ||
| JP2010170360A JP5450306B2 (en) | 2010-07-29 | 2010-07-29 | Gas generator |
| PCT/JP2011/066626 WO2012014788A1 (en) | 2010-07-29 | 2011-07-14 | Gas generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103003656A CN103003656A (en) | 2013-03-27 |
| CN103003656B true CN103003656B (en) | 2015-05-13 |
Family
ID=44509554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180035004.8A Active CN103003656B (en) | 2010-07-29 | 2011-07-14 | Gas generator and method for preventing gas leakage |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US8434413B2 (en) |
| EP (1) | EP2598831B1 (en) |
| JP (1) | JP5450306B2 (en) |
| KR (1) | KR101774077B1 (en) |
| CN (1) | CN103003656B (en) |
| WO (1) | WO2012014788A1 (en) |
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| JP5381932B2 (en) * | 2010-03-02 | 2014-01-08 | 豊田合成株式会社 | Gas generator |
| JP5595237B2 (en) * | 2010-11-12 | 2014-09-24 | 株式会社ダイセル | Igniter assembly |
| CN103338981A (en) * | 2011-01-07 | 2013-10-02 | 日本化药株式会社 | Gas generator |
| JP5638996B2 (en) * | 2011-03-30 | 2014-12-10 | 株式会社ダイセル | Gas generator for personnel restraint system |
| JP5921232B2 (en) * | 2012-02-06 | 2016-05-24 | 株式会社ダイセル | Gas generator |
| JP5986795B2 (en) * | 2012-05-11 | 2016-09-06 | 株式会社ダイセル | Igniter assembly |
| JP5985950B2 (en) * | 2012-10-04 | 2016-09-06 | 株式会社ダイセル | Gas generator and its assembly method |
| US9050944B1 (en) * | 2012-11-30 | 2015-06-09 | Tk Holdings Inc. | Gas generating system with initiator sub-assembly |
| JP6483949B2 (en) * | 2014-01-09 | 2019-03-13 | 株式会社ダイセル | Gas generator |
| JP6276110B2 (en) | 2014-05-09 | 2018-02-07 | 株式会社ダイセル | Gas generator and assembly method |
| JP6585467B2 (en) * | 2014-11-14 | 2019-10-02 | 株式会社ダイセル | Igniter assembly and gas generator using the same |
| KR102298873B1 (en) * | 2017-04-04 | 2021-09-06 | 현대자동차 주식회사 | Pre-tensioner for seat belt of vehicles |
| JP6880505B2 (en) * | 2017-07-14 | 2021-06-02 | 株式会社ダイセル | Discharger and gas generator |
| JP6954520B2 (en) * | 2017-12-05 | 2021-10-27 | 株式会社ダイセル | Ignizer assembly and gas generator |
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Also Published As
| Publication number | Publication date |
|---|---|
| US8434413B2 (en) | 2013-05-07 |
| KR20130098188A (en) | 2013-09-04 |
| JP5450306B2 (en) | 2014-03-26 |
| KR101774077B1 (en) | 2017-09-01 |
| EP2598831A1 (en) | 2013-06-05 |
| US20120024186A1 (en) | 2012-02-02 |
| CN103003656A (en) | 2013-03-27 |
| WO2012014788A1 (en) | 2012-02-02 |
| EP2598831B1 (en) | 2014-11-12 |
| JP2012030639A (en) | 2012-02-16 |
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